package com.sen.design.principle.singleresponsibility;

public class CourseImpl implements ICourseContent,ICourseManager{
    @Override
    public String getCourseName() {
        return null;
    }

    @Override
    public String getCourseID() {
        return null;
    }

    @Override
    public void studyCourse() {

    }

    @Override
    public void refundCourse() {

    }
}
